Quote:
Originally Posted by tatagi
thank you. but it is windows 10 that I am using. it seems like imagemagick is useful for img files, not compressing image files that are within epubs directly.
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Epubs are just zipped directories with a specific set of included files like the container file. If you unzip an ePub, compress the image files, and re-zip the directory, you will have created a new ePub with smaller images. Note that the compressed images should have the exact same filenames, and be in the exact same locations/subdirectories, as the original images (which should be removed before re-zipping).